Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e7bf7ed61c873c…

MALICIOUS

PDF

87.6 KB Created: 2021-08-06 08:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6ece428b95d37462ec950f02f0c790b4 SHA-1: 32e5523e9b1d9222c67af30bdf733544e2395595 SHA-256: 47e7bf7ed61c873c035b6d594fa7e5b11940d5e52067127715c1237ba582f7ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress upload directories and other domains, likely intended to distribute malware or conduct phishing. The document body was not parsable, but the heuristics indicate a strong intent to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/43a3e81a49c7bf22a0e6e3ed97c784d0/xukuxewademetipuriniwo.pdf In PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/30a98d7ffa464cbafc7b29a2bc477428/govadulevu.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/vomalatim.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/pidematixiwoxekapujulavib.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/36787102286.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/e2a3c7705688cf72c37dfea33075a170/zoxumeze.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/34731455758.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/welerifutuda.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/xunumuxokixupumoboj.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e734fef6f2---rovar.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/roweneze.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/7fd2243180043e1b83b49470b78e468f/vinagezuluxur.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/7890c97b0e1b821ee443b86a88bd28f0/12769619546.pdfIn PDF document text
    • http://merwepizza.com/upload/file/83738924262.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/69742599020.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/luxofolowavoxijida.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160823d6b79c5d---wemaromevitavuziribed.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/4add21a0277c0061e51005f0dc68c7e8/wowunumasexivoleju.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/f1d67229f04bbd2e5307f41e04433e0b/pedagulatalovanadogome.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/jamuzulijefumegararatom.pdfIn PDF document text
    • http://sushi-belovo.ru/files/38051378777.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/d2ba99fabdea4f159b8dde4fd1386e14/93479120502.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16102c73eb08b0---ruverarubitam.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/gexunapigefuvizuruv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=baby+height+chart+by+month+in+cmPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1D 10772 bytes
SHA-256: 6c503378821ef8720c19d2aecd302526a1f7be54af690c82bf6c0b475e028479
font_02_sfnt_off000125cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CB 16556 bytes
SHA-256: 4fa6cbc06ecf023a4058e85240a4bc9a4e10c2c841a072002e795fdd742d82eb

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